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Isocyanate-polyol resin as a binder for particleboard

Isocyanate-polyol resin as a binder for particleboard

Forest Products Journal 35(7/8): 44-48

IB of particleboards improved 35% and MOR 13.5% when PEG with a mol. wt. of 1000 (Peg 1000) was added to the unmodified polymeric diphenylmethane diisocyanate adhesive Board properties improved most when the equivalent ratio of PMDI to Peg 1000 was 6:1 or 12:1 - that is, when the formulation was 37 or 23% Peg 1000. Increasing the polyol mol. wt. increased both board properties and resin fracture energy.

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